In OpenGrok how to search a substring?

Question

I have a source file that contains statement like:

    CRITICAL_MSG("\tprobe and attach devices\n");

but I cannot find the string in the "full" field by typing "probe and attach devices". I cannot use wildcard "*probe and attach devices*" either. I have to input the exact string and the backslash: "\\tprobe and attach devices\\n".

So how to find this string?